Packers Defensive Backs Coach Derrick Ansley Leaves Green Bay for Dallas Cowboys

The Green Bay Packers are once again reshaping their defensive coaching staff — and this time, the move benefits a familiar NFC rival.

According to CBS Sports insider Matt Zenitz, the Dallas Cowboys are set to hire former Packers pass game coordinator and defensive backs coach Derrick Ansley. While the move may surprise some fans at first glance, it makes a great deal of sense when viewed through the lens of scheme continuity and league-wide coaching trends.

A Natural Fit in Dallas’ Quarters-Based Defense

Ansley brings with him extensive experience coaching quarters-based defensive systems, a structure both the Cowboys and Packers are expected to run in 2026. His background includes stops at Alabama, Tennessee, and the Los Angeles Chargers, all of which leaned heavily on variations of quarters coverage.

Dallas recently hired Christian Parker from the Philadelphia Eagles as its new defensive coordinator. Parker’s defenses are rooted in quarters principles, making Ansley a logical addition to help implement and communicate the system to players.

Interestingly, Parker was also interviewed by Green Bay earlier in the offseason. Ultimately, the Cowboys moved faster, hiring Parker one day before the Packers brought in Jonathan Gannon for his defensive coordinator interview. Both Parker and Gannon were finalists for the Cowboys job, but Dallas reportedly preferred Parker due to his communication skills with players, a trait highly valued in modern defensive systems.

Why Didn’t Green Bay Retain Derrick Ansley?

Given that Jonathan Gannon will also run a quarters-based defense in Green Bay, Ansley’s departure initially appears puzzling. On paper, his skill set aligns perfectly with what the Packers plan to do schematically.

However, context matters.

Following Jeff Hafley’s departure to become head coach of the Miami Dolphins, Packers head coach Matt LaFleur conducted a relatively narrow defensive coordinator search. He reportedly interviewed four external candidates before selecting Gannon. According to ESPN’s Rob Demovsky, LaFleur also interviewed all four internal defensive assistants, including Ansley, for the coordinator role.

With Ansley now leaving for Dallas, three of those four assistants are gone.

• Sean Duggan, linebackers coach, followed Hafley to Miami

• Ryan Downard, a longtime Packers defensive backs coach, also joined the Dolphins

• Derrick Ansley now heads to the Cowboys

Only defensive line coach/run game coordinator DeMarcus Covington remains without a confirmed 2026 destination.

The Business Side of Assistant Coach Departures

In the NFL, assistant coaches typically can’t move laterally unless one of four things happens:

1. They are fired

2. They receive a coordinator promotion

3. Their contract expires

4. Their team allows them to leave

There has been no reporting that any of Green Bay’s assistants were fired or out of contract. And while Duggan’s title in Miami hasn’t been finalized, neither Ansley nor Downard left for coordinator promotions.

That leaves the fourth option.

The most plausible explanation is that the Packers allowed these assistants to leave.

Why? Because it gives Jonathan Gannon the freedom to build his own defensive staff without forcing Green Bay to pay buyouts. NFL coaching contracts are typically guaranteed, meaning firing assistants can be costly. Allowing them to take lateral jobs elsewhere avoids that expense and accelerates a full defensive reset.

A Rare Clean Break on Defense

If DeMarcus Covington also departs, it would mark a historic shift in Green Bay’s coaching approach.

For decades, Packers defensive coordinators have been forced to retain holdover assistants:

• Dom Capers

• Mike Pettine

• Joe Barry

• Jeff Hafley

All inherited staff members from previous regimes.

A complete staff turnover under Gannon would represent the first true clean slate for a Packers defensive coordinator in decades, signaling a strong organizational commitment to a new identity on that side of the ball.

Early Hires Signal Gannon’s Vision

So far, Green Bay has already made two notable defensive assistant hires:

• Sam Siefkes, former linebackers coach under Gannon (2023–2024), joins to coach linebackers. Siefkes shares a Mike Zimmer coaching lineage, aligning philosophically with Gannon.

• Bobby Babich, previously interviewed by LaFleur for defensive coordinator in 2024 and a member of QB Collective, has been hired to coach defensive backs.

These moves suggest a staff built around trust, familiarity, and shared schematic language.

How Big Will Gannon’s Defensive Staff Be?

Gannon’s previous stops offer clues:

• Philadelphia (4-3 defense): Three on-field defensive coaches (one per level)

• Arizona (3-4 defense): Five on-field coaches, including:

  • Defensive line coach

  • Outside linebackers coach

  • Two secondary coaches

Depending on whether Covington returns, Green Bay could be finished — or could still be searching for up to three additional defensive assistants for 2026, potentially including:

• A new defensive line coach

• Another line-of-scrimmage specialist

• An additional defensive backs coach

Final Takeaway

Derrick Ansley’s move to Dallas isn’t just about one coach changing teams — it’s a clear indicator of organizational direction in Green Bay.

The Packers appear fully committed to giving Jonathan Gannon complete control over the defensive rebuild, even if that means parting ways with capable assistants who fit the scheme on paper.

In the short term, it creates turnover and uncertainty.
In the long term, it may finally give Green Bay the defensive clarity and consistency it has lacked for years.

And for the Cowboys, landing Ansley provides a smooth transition into a new system — one rooted in communication, structure, and familiarity.

Sometimes, the most important offseason battles happen not on the field, but on the coaching staff chart.